Bajajohn77

Hey guys new to offshore only, in a bit of a problem . My 454 mag mpi literally exploded from a massive gasket failure. I came across a long block , 468ci, 10:1 compression, 502 cast heads , cam 114 234/236 diration. Using everything from the 454 mag on this long block . Yes it has more power but I don't know about the efi system . Will it work , can the injectors handled this engine uograde? Do I need to find a 502 ecm or flash the original. Really lost . Engine is in boat and put together , started it but went to Rev and it's gut less . Any help or recommendations will be of value. 25 baja outlaw